TUNIS, Tunisia (AP) — Protesters have thrown stones and tomatoes at Tunisian leaders at a ceremony marking two years since the start of an uprising that changed regimes around the Arab world.

Some 3,000 people demanding jobs and angry at the moderate Islamist-led government protested at the ceremony. They threw projectiles and booed President Moncef Marzouki, who urged patience and said he has no "magic wand" to bring down unemployment.

The ceremony Monday marked two years since the day when a street vendor set himself on fire to protest pressure from authorities under longtime President Zine El Abidine Ben Ali. Vendor Mohamed Bouazizi's act set off demonstrations that spread around Tunisia and several Arab countries.

Tunisia's radical Islamists have since grown increasingly vocal, and disaffected youth stage sporadic protests that sometimes degenerate into violence.